CN102616893A - Wastewater treatment system - Google Patents

Wastewater treatment system Download PDF

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Publication number
CN102616893A
CN102616893A CN2012100959230A CN201210095923A CN102616893A CN 102616893 A CN102616893 A CN 102616893A CN 2012100959230 A CN2012100959230 A CN 2012100959230A CN 201210095923 A CN201210095923 A CN 201210095923A CN 102616893 A CN102616893 A CN 102616893A
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waste water
catalytic
reaction cell
plate
water treatment
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CN2012100959230A
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CN102616893B (en
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刘德启
刘帅
畅如
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Suzhou University
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Suzhou University
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Abstract

The invention provides a wastewater treatment system, which comprises a reaction tank body, an electrolysis device, an electrolysis air supply system, a catalytic material and a separation net, wherein the reaction tank body comprises a water inlet and a water outlet; the water inlet and the water outlet are formed at upper ends of two opposite side walls of the reaction tank body respectively; the electrolysis device comprises a positive plate, a negative plate and a power supply; the positive plate and the negative plate are arranged in the reaction tank body; the power supply is electrically connected to the positive plate and the negative plate; the electrolysis air supply system comprises an aeration pipe and an air pump; the aeration pipe is arranged at the bottom of the reaction tank body; the catalytic material is filled in the reaction tank body and is transition metal loaded carbon base or silicon dioxide base particles; and the separation net is arranged at the water outlet. The wastewater treatment system has the advantages of high efficiency, cleanness in a treatment process and no or less sludge production.

Description

Waste Water Treatment
Technical field
The invention belongs to the field of purification of waste water, relate in particular to a kind of advanced waste treatment system.
Background technology
Economizing on resources and protecting environment is a fundamental state policy of China.During " 12 ", National urban WWT recovery utilization rate will reach 10% target, can practice thrift fresh water resource more than 70 hundred million m every year 3, this can alleviate China effectively, the problem of dry shortage of water resources especially, so waste water recycling has important practical significance.
The total quantity of wastewater effluent in the whole nation is more than 700 hundred million tons at present, and the consumption of national reuse water has only 16.6 hundred million m 3, only accounting for 2% of national wastewater/sewage quantity discharged, the target of distance 10% falls far short.Therefore to accomplish the guiding that this target not only depends on national policy, the macro adjustments and controls factors such as adjustment of market water price; More need efficient, cleaning, reduced investment, the reliable waste water advanced processing and the practical application of reuse technology that running cost is low, so the following investment of reuse water space ten minutes is wide.
Reuse water is meant the discharge water that reaches emission standard after process pre-treatment such as city domestic sewage and factory effluent and biochemical process are handled; Again after further handling; Reach the water quality standard of a certain purposes, be back to the potential water resources of this production process like industrial cooling water, the irrigation of city trees and shrubs view etc.But in the wastewater to reach standard treating processes, significant variation has taken place in the parent compound in the former sewage/wastewater, not only be embodied in compound composition, change in nature, and its molecular conformation all has different significantly with size.Therefore, in advanced treatment, continuing with biochemical process is main purification process, and then often the removal efficient to pass key control water-quality guideline such as COD (chemical oxygen demand) is very low.At present the treatment technology of reuse water is common has membrane technique, MBR method, Fonton reagent oxidation method, a photocatalytic oxidation etc., or with other physical chemistry methods, like the combination process of flocculation, filtration etc.But particular problems such as treatment scheme is long, floor space is big, running cost height that these combination procesies not only exist; In treating processes, can produce a large amount of mud simultaneously.These moisture percentage in sewage sludge are high, and processing cost is high, and the mud that especially contains the I pollutant is all the more so.The direct discharging of mud or mud miscarriage just make that nowadays the sewage work that disposes of sewage becomes new environomental pollution source, and caused showing great attention to of various circles of society also becomes the new problem that needs to be resolved hurrily in the present wastewater treatment process at present.
Therefore be badly in need of a kind of efficient, treating processes cleaning of exploitation, low or do not have waste water advanced treatment technology and a device that mud produces.
Summary of the invention
In view of this, the invention provides a kind of Waste Water Treatment, this Waste Water Treatment is efficient, energy consumption is low, comprehensive treating process is with low cost, and treating processes cleaning, nothing or few mud produce.
For realizing above-mentioned purpose, the present invention provides following technical scheme:
A kind of Waste Water Treatment comprises reaction cell body and electrolyzer, and said reaction cell body includes the mouth of a river and water outlet; Said water inlet and water outlet are located at the upper end of two relative sidewalls of said reaction cell body respectively, and said electrolyzer comprises positive plate, negative plate and power supply, and said positive plate and negative plate are located in the said reaction cell body; Said power supply is electrically connected at said positive plate and negative plate; Especially, said Waste Water Treatment also comprises electrolysis airing system, catalytic material and separate mesh, and said electrolysis airing system comprises aeration tube and pneumatic pump; Said aeration tube is located at the bottom of said reaction cell body; Said catalytic material fills in the said reaction cell body, and said catalytic material is the carbon back or the silica-based particles of carrying transition metal, and said separate mesh is located at said water outlet place.
Preferably, in above-mentioned Waste Water Treatment, also be doped with titanium oxide in the said catalytic material.
Preferably, in above-mentioned Waste Water Treatment, a plurality of said positive plates and negative plate are provided with certain interval, and the adjacent setting parallel with negative plate of said positive plate.
Preferably, in above-mentioned Waste Water Treatment, a plurality of said aeration tubes are provided with certain interval.
Preferably, in above-mentioned Waste Water Treatment, said aeration tube is parallel to said positive plate.
Preferably, in above-mentioned Waste Water Treatment, said aeration tube is located between the said adjacent positive plate and negative plate.
Preferably, in above-mentioned Waste Water Treatment, said reaction cell body is processed to form by PP plate or PVC plate.
Compared with prior art, in Waste Water Treatment of the present invention, with carbon back or SiO 2Base carrying transition metal doped Ti O 2Deng prepared can either be from low concentration wastewater the selective enrichment pollutent, the environmental catalysis material that has high degree of electrical catalytic activation performance again; This material requires to be loaded in the reaction cell body according to certain loading level, and combines with the electrolysis tech of waste water; Utilize the electrolysis airing system simultaneously, produce active oxygen species when oxygen (DO) being provided with the power supply activation, also directed round-robin power is provided simultaneously for catalytic material for the negative plate in the reaction cell body.Owing in the reaction cell body, added catalytic material, feasible treatment effect and processing efficiency to the low concentration used water difficult to degradate is greatly enhanced; With present waste water three-dimensional electrolysis compared with techniques, this technology adopts is fluidized-bed but not fixed bed, and catalytic material inactivation and fouling risk reduce greatly, the catalytic efficiency (of catalytic material be greatly improved and loading level less.Because catalytic material is strong to the catalytic activity of DO and mechanical stability catalytic material is good; Pollutent is nearly all by degraded and catalytic material itself are difficult for efflorescence fully in treating processes; So should technology and the maximum difference of traditional electrolysis or three-dimensional electrolysis technology be that its its energy consumption is low, comprehensive treating process is with low cost, and the treating processes cleaning, do not have or few mud produces.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Vertical view for the Waste Water Treatment that provides in the specific embodiment of the invention shown in Figure 1;
Front view for the Waste Water Treatment that provides in the specific embodiment of the invention shown in Figure 2.
Embodiment
In order to make those skilled in the art understand technical scheme of the present invention better; Below in conjunction with accompanying drawing and embodiment the present invention is carried out clear, intactly description; Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention provides a kind of Waste Water Treatment, comprises reaction cell body and electrolyzer, and said reaction cell body includes the mouth of a river and water outlet; Said water inlet and water outlet are located at the upper end of two relative sidewalls of said reaction cell body respectively; Said electrolyzer comprises positive plate, negative plate and power supply, and said positive plate and negative plate are located in the said reaction cell body, and said power supply is electrically connected at said positive plate and negative plate; Said Waste Water Treatment also comprises electrolysis airing system, catalytic material and separate mesh; Said electrolysis airing system comprises aeration tube and pneumatic pump, and said aeration tube is located at the bottom of said reaction cell body, and said catalytic material fills in the said reaction cell body; Said catalytic material is the carbon back or the silica-based particles of carrying transition metal, and said separate mesh is located at said water outlet place.
Join illustrated in figures 1 and 2ly, Waste Water Treatment 10 comprises reaction cell body 11, electrolyzer 12, electrolysis airing system 13, catalytic material 14 and separate mesh 15.
Reaction cell body 11 preferably is arranged to cuboid, adopts PP plate or PVC plate to process.The upper end of reaction cell body 11 left sidewalls offers water inlet 111, and the upper end of reaction cell body 11 right-hand sidewalls offers water outlet 112, and water outlet 112 preferably is lower than the height of water inlet 111.The lower end of reaction cell body 11 can also be provided with evacuation port 113, and the discharge of wastewater that evacuation port 113 can will react in the cell body 11 when Waste Water Treatment 10 does not use is gone out.Water inlet 111, water outlet 112 and evacuation port 113 places can be respectively equipped with valve (figure does not show).In other embodiments, the shape of reaction cell body 11 can be arranged to other shapes, for example right cylinder.
Electrolyzer 12 comprises positive plate 121, negative plate 122 and power supply 123.Positive plate 121 is installed in the reaction cell body 11 with negative plate 122, and is graphite electrode plate.A plurality of graphite electrode plates in reaction cell body 11 edge from left to right the direction of (direction of water inlet 111 to water outlet 112) with certain being intervally arranged; And electrically connect according to the positive and negative electrode output terminal of the power supply 123 of positive and negative electrode interactive approach and configuration, power supply 123 is preferably direct supply.Positive plate 121 and the base plate of negative plate 122 perpendicular to reaction cell body 11.In practical application, because the restriction of reaction cell body 11 volumes, positive plate 121 can only be set to one group with negative plate 122, promptly has only a positive plate 121 and a negative plate 122.
Electrolysis airing system 13 comprises aeration tube 131 and pneumatic pump 132.Aeration tube 131 is provided with a plurality of, and the parallel bottom that is distributed in reaction cell body 11, and aeration tube 131 preferred parallel are provided with in said positive plate 121 or negative plate 122, and further, aeration tube 131 preferably is located between adjacent positive plate 121 and the negative plate 122.Pneumatic pump 132 is connected in aeration tube 131; Produce active oxygen species in the time of can oxygen being provided with the power supply activation for the negative plate in the reactive tank body 11 122; Simultaneously also directed round-robin power is provided for catalytic material 14; And then making catalytic material 14 inactivations and fouling risk reduce greatly, the catalytic efficiency (of catalytic material 14 is greatly improved.Electrolysis airing system 13 can also comprise air flowmeter or pressure lock etc.In other embodiments, the quantity of aeration tube 131 also can only be provided with one.
Catalytic material 14 is the carbon back or the silica-based particles of carrying transition metal, can also be doped with titanium oxide in the catalytic material 14.This catalytic material 14 can either be from low concentration wastewater the selective enrichment pollutent, have high degree of electrical catalytic activation performance again.In reaction cell body 11, added catalytic material 14, feasible treatment effect and processing efficiency to the low concentration used water difficult to degradate is greatly enhanced.
The volume that the loadings of catalytic material 14 accounts for reaction cell body 11 is preferably 30%~60%.
Separate mesh 15 is located at water outlet 122 places, with interception catalytic material 14, prevents that catalytic material 14 from being taken away by water and run off.
Utilize in the process that 10 pairs of waste water of above-mentioned Waste Water Treatment handle; Drive through pump, make waste water be transported to water inlet 111, after the under meter metering; Enter into reaction cell body 11 and carry out the catalytic oxidation processing, average reaction time (being hydraulic detention time) gets final product for 20min.Waste water effluent quality after treatment can satisfy the requirement of standard.Emission standard is carried out (being that COD is lower than 50mg/L) according to present urban wastewater treatment firm emission standard (GB18918-2002) I class (A standard).
The user when being used for different waste water or satisfying different purposes demands, can adjust reaction times or adjustment electrolytic parameter and catalytic material 14 loadings, through satisfying the processing requirements of dissimilar trade effluents after the parameter optimization according to actual needs.
Below in conjunction with embodiment the effect of Waste Water Treatment 10 provided by the invention is elaborated.
Embodiment 1
Treatment effect analysis to water outlet behind the refinery water biochemistry.
Refinery water belongs to used water difficult to degradate, and the oil refining process water consumption is big, and the water quality complicacy and the fluctuation of waste discharge are strong.Utilize the above-mentioned Waste Water Treatment 10 of processing power, a tame oil refinery effluent has been carried out 30 days on-the-spot continuous service test through the discharge water behind the biochemistry for 60L/h.The result shows: when influent quality index COD fluctuation changes between 80.0-360mg/L MV 220mg/L; Ammonia nitrogen concentration is when the 40.0mg/L left and right sides, and controlling reaction time is 20min, and the COD of reaction back system water outlet is lower than 50mg/L, and average removal rate can reach 80.1%; The ammonia nitrogen concentration of water outlet is lower than 4mg/L, and ammonia nitrogen removal frank is reached more than 90%; The average sludge output of system was lower than every liter of waste water 50mg when electrolysis finished.And effluent quality is good and it is steady to change, and this illustrative system is fine to organic shock resistance.
Embodiment 2
The treatment effect analysis of water outlet behind the dyeing waste water biochemistry.
The printing and dyeing industry water consumption is big, and water quality is complicated, and the Pollutant levels fluctuation is big.Utilize the above-mentioned Waste Water Treatment 10 of processing power, the discharge water behind the how tame dyeing waste water biochemistry has been carried out the on-the-spot continuous service test in 3 weeks for 60L/h.The main water-quality guideline of experiment water is: influent quality index COD fluctuation changes between 80-120mg/L, during MV 100mg/L; Colourity is 40-80, and MV is 60.Controlling reaction time is 20min during experiment.Water outlet is the result show: this device still can reach 60% to the average removal rate of COD, and water outlet COD is lower than 50mg/L, and the clearance of colourity is near 100%; The average sludge output of system was lower than every liter of waste water 60mg when electrolysis finished.Effluent quality is steady, and is respond well, can reach the water quality standard requirement of reuse water.
Embodiment 3
The advanced treatment effect analysis of water outlet after the sanitary wastewater biochemical treatment.
The generation of sanitary wastewater has surpassed at present the quantity discharged of trade effluent, becomes the main wastewater source in China's wastewater treatment industry, and it also is the most important potential water source in the reuse water field from now on simultaneously.According to the sewage emission standard of present China, the discharge water COD after require handling is lower than 50 or the standard of 60mg/L.Taihu Lake basin requires COD to be lower than 50 in Jiangsu Province, and ammonia nitrogen is lower than 5 or 8mg/L.But this standard is for some old sewage works, and COD requires to be lower than 80 or 120mg/L during its technological design, and ammonia nitrogen is not had standard-required.Therefore this technology is suitable for the technological transformation of old sewage work and waste water recycling basin from now on.Utilize the above-mentioned Waste Water Treatment 10 of processing power for 60L/h, to 30 days test in place of an old sewage work of family, test water quality is: influent quality index COD fluctuation changes between 60-150mg/L, during MV 105mg/L; Ammonia nitrogen is 20-60mg/L, and MV is 40mg/L.Controlling reaction time is 20min during experiment.Water outlet is the result show: this device still can reach 70% to the average removal rate of COD, and ammonia-N removal rate is near 100%; The average sludge output of system was lower than every liter of waste water 30mg when electrolysis finished.Effluent quality is good and variation is steady, respond well, can reach the water quality standard requirement of reuse water.
The The above results explanation, Waste Water Treatment 10 of the present invention can be widely used in the different wastewater treatments, and treatment effect is good, and system's sludge output is low, the process cleaning, processing cost is low, has very big market outlook.
Total the above, in Waste Water Treatment of the present invention, with carbon back or SiO 2Base carrying transition metal doped Ti O 2Deng prepared can either be from low concentration wastewater the selective enrichment pollutent, the environmental catalysis material that has high degree of electrical catalytic activation performance again; This material requires to be loaded in the reaction cell body according to certain loading level, and combines with the electrolysis tech of waste water; Utilize the electrolysis airing system simultaneously, produce active oxygen species when oxygen (DO) being provided with the power supply activation, also directed round-robin power is provided simultaneously for catalytic material for the negative plate in the reaction cell body.Owing in the reaction cell body, added catalytic material, feasible treatment effect and processing efficiency to the low concentration used water difficult to degradate is greatly enhanced; With present waste water three-dimensional electrolysis compared with techniques, this technology adopts is fluidized-bed but not fixed bed, and catalytic material inactivation and fouling risk reduce greatly, and the catalytic efficiency (of catalytic material is greatly improved.Because catalytic material is strong to the catalytic activity of DO and mechanical stability catalytic material is good; Pollutent is nearly all by degraded and catalytic material itself are difficult for efflorescence fully in treating processes; So should technology and the maximum difference of traditional electrolysis or three-dimensional electrolysis technology be that its energy consumption is low, comprehensive treating process is with low cost, and the treating processes cleaning, do not have or few mud produces.
And the site test results of multiple factory effluent shows; This technological system has to the advanced treatment of water outlet, the water outlet of dyeing waste water biochemical system and the water outlet of refinery biochemical treatment system etc. of domestic sewage processing system that volume of equipment efficient is high, treatment effect is good, low or do not have mud generation, stable effluent quality, running cost is low, energy consumption is little; Level of automation is high, simple to operate, and with the compatible many technological merits such as good of original water treatment system.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (7)

1. a Waste Water Treatment comprises reaction cell body and electrolyzer, and said reaction cell body includes the mouth of a river and water outlet; Said water inlet and water outlet are located at the upper end of two relative sidewalls of said reaction cell body respectively; Said electrolyzer comprises positive plate, negative plate and power supply, and said positive plate and negative plate are located in the said reaction cell body, and said power supply is electrically connected at said positive plate and negative plate; It is characterized in that: said Waste Water Treatment also comprises electrolysis airing system, catalytic material and separate mesh; Said electrolysis airing system comprises aeration tube and pneumatic pump, and said aeration tube is located at the bottom of said reaction cell body, and said catalytic material fills in the said reaction cell body; Said catalytic material is the carbon back or the silica-based particles of carrying transition metal, and said separate mesh is located at said water outlet place.
2. Waste Water Treatment according to claim 1 is characterized in that: also be doped with titanium oxide in the said catalytic material.
3. Waste Water Treatment according to claim 1 is characterized in that: a plurality of said positive plates and negative plate are provided with certain interval, and the adjacent setting parallel with negative plate of said positive plate.
4. Waste Water Treatment according to claim 3 is characterized in that: a plurality of said aeration tubes are provided with certain interval.
5. Waste Water Treatment according to claim 4 is characterized in that: said aeration tube is parallel to said positive plate.
6. Waste Water Treatment according to claim 5 is characterized in that: said aeration tube is located between the said adjacent positive plate and negative plate.
7. Waste Water Treatment according to claim 1 is characterized in that: said reaction cell body is processed to form by PP plate or PVC plate.
CN201210095923.0A 2012-04-01 2012-04-01 Wastewater treatment system Active CN102616893B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103435133A (en) * 2013-09-12 2013-12-11 苏州大学 Waste water treatment system
CN103449574A (en) * 2013-09-12 2013-12-18 苏州大学 Wastewater treatment system
CN103723870A (en) * 2012-12-28 2014-04-16 肖英 Water purifying plant capable of enhancing performance of conventional water purifier
CN104591351A (en) * 2015-02-13 2015-05-06 中新环科(天津)科技有限公司 Ionic exchange membrane electrolytic cell device for treating chemical production wastewater

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CN202508904U (en) * 2012-04-01 2012-10-31 苏州大学 Waste water treatment system

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CN1562795A (en) * 2004-04-07 2005-01-12 太原理工大学 Photoelectrocatalysis and oxidation device for treating organic substance in water
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* Cited by examiner, † Cited by third party
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CN103723870A (en) * 2012-12-28 2014-04-16 肖英 Water purifying plant capable of enhancing performance of conventional water purifier
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CN104591351B (en) * 2015-02-13 2016-05-18 中新环科(天津)科技有限公司 A kind of electrolysis with ion-exchange film slot device of processing chemical production wastewater

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